Improvement in boot and shoe nailing machines



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BOOT-AND SI'IOE NAILING-MACHINES. N10, 184,Z81. Patented Nov-.14, 1876.

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, Boo'r AND SHOE NAILING-MACHINES. Nro.184,281, Patented Nov.14,1e7e.

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` H. DUNHII.v BOOT AND SHE NAILING-MACHINES. No. 184,281. Patented Nov.14, 187B.

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H. DUNHAM. BOOT AND SHOE NAILING-MACHINE S. No. 184,281. Patented Nov.14,1876.

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'TH E GRAPHIC E70-*LY ilnmnn S'ra'rns PATENT @amen HENRY DIINHAM, OFABINGTON, MASSACHUSETTS.

IMPROVEMENT IN BOOT AND SHOE NAlLlNG MACHINES.l

Specification forming part of Letters Patent No. 184,281, dated November14, 1876; application iiled August l0, 1874. A

To all whom it may concern Beit known that I, HENRY DUNHAM, of Abington,in the county of Plymouth and State of Massachusetts, have inventedcertain new and useful Improvements in Nailfor lasting boots and shoes,consisting in the employment of a rotary shaft, with a cam, for theraising of the driver, and a spring, for the purpose of forcing thedriver downward onto the nail, in combination with anautomaticallyoperating nail-reservoir, and automaticallymoved ways onwhich the nails are conducted to a side opening in the lower part of astationary tube, through which the driver descends as soon as the nailhas entered the tube. The side opening in the aforesaid stationary tubeis closed by an automaticallymoved picker as soon as the nail hasentered the stationary tube, and a pair of elastic springs on each sideof the stationary tube serve for the purpose of centering the nailprevious to its being driven.

The boot or shoe that is to be 'lasted is placed on a last-that is heldfirmly on a jack orrsuitable support, forced upward by means of a weightacting on a lever, or equivalent devices.` The operator can remove theboot or shoe from its contact with the stationary nailtube,simply bypressing on a treadlelever'connected with the jack or support. Asecondary treadle-lever is made to operate a belt-tightener, so that themachine will be set in motion as soon as the operator exerts a slightpressure on the secondary treadle, and the machine will continue inoperation 'as long as the operator retains his foot on the treadle. Inconnection with this, my lastingmachine, l use a pair of ordinarypinchers for the purpose of stretching the upper on the last, and tohold it in position during the time when the driver drives the nails.From this it will be understood that the operation of lasting a boot orshoe, as described, is performed partly by hand, for the purpose ofstretching the upper over the last, and partly by machine, for thepurpose of feeding the boot or shoe forward, feeding the nails intoposition, and `to drive the nails through the upper that is being heldby the pinchers in the hand ot' the operator.

On the drawings, Figure 1 represents a front elevation of my invention.Fig. 2 represents a side elevation, seen from X, on Fig. l. Fig. 3represents a central longitudinal section, on the line A B, shown inFig. 1, and Fig. 4 represents a crosssectionl on the line CD shown inFig. 2. Fig. 5 represents a sectional elevation of the inclined ways forthe nails.

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawings.

a representsl the standard, and b represents the head or upper frame ofthe machine. In the lower part of the standard a is a fulcrum, c, forthe treadle-lever d, provided with the treadle d and balanceweight e, inthe ordinary way. The forward end of the treadlelever d is jointed tothe lower end of a jack or support,f, to the upper end of which the lastis attached during the operation of lasting boots and shoes. grepresents the drivingshaft, to which is secured the driving-pulley h.c' i represent a belttightener, provided with the roller k, whichbelt-tightener is made to turn on a fulcrum, l, and is operated by meansof a secondary treadle-lever, m, and connecting-rod n, as shown in Fig.2. By the arrangement of the treadle-lever m, connecting-rod n, andbelt-tightener i i 7c, the operator can start the machine simply bypressing his foot on the treadle m, when the machine will commence todrive nails, and continue so to do as long as the operator retains hisfoot on the said treadle. To the drivingshaft g is secured a cam, o,that acts upon a pin or stud, p, that forms a part of the driver, q, bywhich arrangement the said driver is raised upward during eachrevolution of the cam o. The driver q is faced downward by the action ofa coiled spring, r, that is confined between a collar on the driver, g,and the upper end of the cylindrical receptacle s. The upper end of thedriver gis provided with a regulating-nut, t, by means of which thethrow ofthe driver can be adjusted. u represents a revolvingnail-reservoir that is set in a rotary motion around its axis bymeans ofthe cord-pulley v on the driving-shaft, the cord-pulley w on thenail-reservoir shaft, and a belt or cord connecting` the two saidcordpu-lleys in the ordinary way. 'Ihe reservoiru is perforated on itscircumference, through which the nails drop into the stationary receptacle x, provided in its lower part with a conductor, y. From thelatter the nails drop into the tapering box z, to which the ways 1 1 areattached. A lateral shock or concussion is given to the box z and ways 11, during each revolution of the driving-shaft g, by means of thecam-wheel 2, rocking-arm 3, supporting-arm 4, to the lower end of whichthe ways 1 1 are secured, and a spring, 5, as shown in Figs. 1 and 2.The object of iinparting a lateral motion or a shock to the ways 1 1 isto insure the delivery of a nail to the stationary tube 6 for everyrevolution of the driving-shaft, and to prevent the nails from cloggingtogether in the box z and ways l 1. The nails are picked one by one fromthe Ways l 1 by means of the laterally-adj ustable bar 7, that isoperated by means of a camwheel, 8, on the driving-shaft g, and arocking-lever, 9, the lower end of which is hinged I to the bar 7, asshown in Fig. 2. A spring, 10, acts in connection with the cam 8 for theoperation ofthe picker 7. 11 represents the feeder that is pointed inits lower end, and to which is imparted, by suitable intermediatemechanism from the driving-shaft, a vertical as well as lateral motion.During the upward motion of the aforesaid feeder it allows the boot orshoe to rest against a sharp projection, 12, on the end ofthe nail-tube6, that is provided with a side entrance, 14, for the nails io enter thenail-tube from the ways 1 1. On two opposite sides of the nail-tube 6are secured a pair of elastic dies, 15 15, for the purpose of centeringthe nail. On the top of the movable :ways' 1 lis secured anadjustableeover, 16, (shown in Fig. 5,) the object of which is twofold,namely, first, to guide the nails or tacks properly in the movable ways;and, secondly, to hold the nail that is beingpicked in y.its properposition, so that the picker can take it easily, which is veryimportant, as otherwise the nails would be apt to hang in positions inwhich the picker could not take them. The lower extreme end of the cover16 (shown in Fig. 5) is provided with a yielding projection or lip, 17,that serves as a stop for the lowest nail that is nearest to the picker,till such time as the picker passes between it and the next nail. Whenthe Ways 1 1 recede from the nailtube, the cover16 yields to the nailand allows it to remain in the nail-tube, inclosed by the picker, inaproper position to be driven when the driver descends.

What I wish to secure by Letters Patent, and claim, is-

1. The automatically -operated intermittin gly-reciprocatin g guideways1 1, in combination with'the nailtube 6, substantially as and for thepurpose setforth and described.

2. In combination with the driver q, its nailtube 6, having the sideopening 14 below the highest position of the driver q, and the picker 7,and movable ways or track 1 1, substantially as set forth. A

V3. In a nailing-machine, the combination with the ways or/track 1 1, ofthe adjustable cover 16, as and forthe purpose set forth.

4. In a nailing-machine, the combination'of the movable ways or track l1 with the movable yielding stop 17, as and for the purpose set forth.

In testimony that I claim the foregoing as my own invention I have afxedmy signature in presence of two witnesses.

HENRY DUN HAM. Witnesses:

ALBAN ANDRN, JOHN R. HEARD.

